858934421280 has 576 divisors, whose sum is σ = 3284045856000. Its totient is φ = 202975911936.

The previous prime is 858934421249. The next prime is 858934421299. The reversal of 858934421280 is 82124439858.

858934421280 is a `hidden beast` number, since 8 + 5 + 8 + 9 + 344 + 212 + 80 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 97171101 + ... + 97179939.

It is an arithmetic number, because the mean of its divisors is an integer number (5701468500).

Almost surely, 2^858934421280 is an apocalyptic number.

858934421280 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 858934421280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1642022928000).

858934421280 is an abundant number, since it is smaller than the sum of its proper divisors (2425111434720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

858934421280 is a wasteful number, since it uses less digits than its factorization.

858934421280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9081 (or 9070 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 54.

The spelling of 858934421280 in words is "eight hundred fifty-eight billion, nine hundred thirty-four million, four hundred twenty-one thousand, two hundred eighty".